You can try this first, may be a problem since you are not familiar with doing it. To check the float operation with carburetor mounted. Remove the drain plug, use a spray can plastic extension up through drain hole. Place end under the float opposite the needle valve area. Gently move the float up and down angling the plastic to each side a little to move what play the float and pin has toward each wall. You can feel it if they drag the sides or if there's a hinge problem. Also with help you can gently hold the needle and seat closed, turn fuel on a little and see if fuel leaks down on your hand. If so the needle and seat is not sealing, gasket on seat leaking or a damaged, leaking throttle body casting.
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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